import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage>
    with SingleTickerProviderStateMixin {
  late AnimationController _controller;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: SlideTransition(
            position: Tween(begin: Offset(0, -0.5), end: Offset(0, 0.8))
                .chain(CurveTween(curve: Interval(0.8, 1.0)))
                .animate(_controller),
            // position: _controller
            //     .drive(Tween(begin: Offset(0, 0), end: Offset(0.1, 0))),
            // scale: _controller.drive(Tween(begin: .5, end: 2.0)),
            child: Container(
              width: 300,
              height: 300,
              color: Colors.blue,
            )),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          _controller.stop();
        },
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }

  @override
  void initState() {
    super.initState();
    _controller = AnimationController(
      duration: const Duration(seconds: 1),
      vsync: this,
    )..repeat();
    // _controller.addListener(() {
    //   print("${_controller.value}");
    // });
  }

  @override
  void dispose() {
    _controller.dispose();
  }
}
